Appendix 2 I/O Signals; List Of I/O Signals; Details Of I/O Signals - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Appendix 2
This section describes the I/O signals for the CPU module. The I/O signal assignment of when the start I/O number of the
master/local module is "0" is listed below.

List of I/O signals

The following table lists I/O signals. The device X is an input signal from the master/local module to the CPU module. The
device Y is an output signal from the CPU module to the master/local module.
Input signals
Device No.
X0
X1
X2
X3
X4 to XE
XF
X10 to X1F
Output signals
Device No.
Y0 to Y1F
Do not use (turn on) any "use prohibited" signals as an input or output signal to the CPU module. Doing so
may cause malfunction of the programmable controller system.

Details of I/O signals

Module failure (X0)
This signal is used to check the status of the master/local module.
• Off: Module normal
• On: Module failure
Module failure (X0)
Module READY (XF)
Power-on
Own station data link status (X1)
This signal is used to check the data link status of the own station.
• Off: Data link stop
• On: Data link in progress
'Data link error status of own station' (SB0049) has the same signal, but when using it in a program, use either X1 or 'Data link
error status of own station' (SB0049) only. Also note that the on/off conditions for X1 and SB0049 are reversed. If an error
occurs, the cause of the fault can be checked by CC-Link IE Field Network diagnostics or 'Cause of data link stop' (SW0049).
I/O Signals
Signal name
Module failure
Own station data link status
Use prohibited
Other stations data link status
Use prohibited
Module ready
Use prohibited
Signal name
Use prohibited
APPX
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Appendix 2 I/O Signals

A